PDBsum entry 5urc

Oxygen transport

PDB id: 5urc

Contents

Protein chains

141 a.a.

146 a.a.

Ligands

CMO-HEM ×4

8MV

FUX

Waters ×1234

PDB id:

5urc

Name:

Oxygen transport

Title:

Design, synthesis, functional and biological evaluation of ether and ester derivatives of the antisickling agent 5-hmf for the treatment of sickle cell disease

Structure:

Hemoglobin subunit alpha. Chain: a, c. Synonym: alpha-globin,hemoglobin alpha chain. Hemoglobin subunit beta. Chain: b, d. Synonym: beta-globin,hemoglobin beta chain

Source:

Homo sapiens. Human. Organism_taxid: 9606. Organism_taxid: 9606

Resolution:

1.85Å R-factor: 0.179 R-free: 0.223

Authors:

P.P.Pagare,R.S.Safo,A.Gazi

Key ref:

G.G.Xu et al. (2017). Design, Synthesis, and Biological Evaluation of Ester and Ether Derivatives of Antisickling Agent 5-HMF for the Treatment of Sickle Cell Disease. Mol Pharm, 14, 3499-3511. PubMed id: 28858508 DOI: 10.1021/acs.molpharmaceut.7b00553

Date:

10-Feb-17 Release date: 15-Mar-17

Protein chains

P69905  (HBA_HUMAN) -  Hemoglobin subunit alpha from Homo sapiens

Seq: 142 a.a.

Struc: 141 a.a.

Protein chains

P68871  (HBB_HUMAN) -  Hemoglobin subunit beta from Homo sapiens

Seq: 147 a.a.

Struc: 146 a.a.

DOI no: 10.1021/acs.molpharmaceut.7b00553

Mol Pharm 14:3499-3511 (2017)

PubMed id: 28858508

Design, Synthesis, and Biological Evaluation of Ester and Ether Derivatives of Antisickling Agent 5-HMF for the Treatment of Sickle Cell Disease.

G.G.Xu, P.P.Pagare, M.S.Ghatge, R.P.Safo, A.Gazi, Q.Chen, T.David, A.B.Alabbas, F.N.Musayev, J.Venitz, Y.Zhang, M.K.Safo, O.Abdulmalik.

ABSTRACT

Candidate drugs to counter intracellular polymerization of deoxygenated sickle hemoglobin (Hb S) continue to represent a promising approach to mitigating the primary cause of the pathophysiology associated with sickle cell disease (SCD). One such compound is the naturally occurring antisickling agent, 5-hydroxymethyl-2-furfural (5-HMF), which has been studied in the clinic for the treatment of SCD. As part of our efforts to develop novel efficacious drugs with improved pharmacologic properties, we structurally modified 5-HMF into 12 ether and ester derivatives. The choice of 5-HMF as a pharmacophore was influenced by a combination of its demonstrated attractive hemoglobin modifying and antisickling properties, well-known safety profiles, and its reported nontoxic major metabolites. The derivatives were investigated for their time- and/or dose-dependent effects on important antisickling parameters, such as modification of hemoglobin, corresponding changes in oxygen affinity, and inhibition of red blood cell sickling. The novel test compounds bound and modified Hb and concomitantly increased the protein affinity for oxygen. Five of the derivatives exhibited 1.5- to 4.0-fold higher antisickling effects than 5-HMF. The binding mode of the compounds with Hb was confirmed by X-ray crystallography and, in part, helps explain their observed biochemical properties. Our findings, in addition to the potential therapeutic application, provide valuable insights and potential guidance for further modifications of these (and similar) compounds to enhance their pharmacologic properties.